TimerGlass is the field companion for film photographers — reciprocity, pinhole geometry, exposure estimation, and a beautiful timer, all in one quietly designed app.
WHAT IT DOES
• Reciprocity failure correction for 100+ film stocks (Ilford, Kodak, Fuji, Foma, Rollei, ADOX, CineStill, Lomography and more) — built from manufacturer data sheets.
• ND filter stack and bellows extension compensation are folded into the same calculation.
• Pinhole camera tool — Lord Rayleigh's optimal aperture, effective f-number, equivalent angle of view by film format, and Sunny-16 exposure estimation that flows straight into the timer.
• Long-exposure timer with Live Activity and Dynamic Island, accurate even when your phone is locked.
• Long-exposure side-effects advice — pull-development guidance for B&W, color-shift tips for negative and slide film, contextual to your actual exposure time.
• History of recent exposures with all the parameters you used.
• Custom film stocks — define your own with power-law or lookup-table reciprocity curves.
DESIGNED FOR
Large-format and pinhole photographers who do long exposures often, 35mm and medium-format shooters chasing dusk and night scenes, and anyone tired of squinting at a film data sheet by torchlight.
LANGUAGES
English, 简体中文, 繁體中文, 日本語, Deutsch, Français.
PRIVACY
TimerGlass collects nothing. Everything you do stays on your device.
